I want to ask: is posible install 2 clusterwares (Infrastructure Grid) on the same machine. We want to have 2 ORA_GRID_HOME in the saeme machine for having 2 solutions complety indepently.
In short the answer is no.
Is possible install 2 Clusterware Software on same host, but you can have one Clusterware configured/active a time.
Why you want 2 Cluster on same host? I've never seen a host configured with two cluster configured.
The cluster is a set of host working as single host, so the software cluster manage and control the hosts, if you have 2 cluster on same host the both software cluster will have concurrency disputing who manages the host and this must not occur.